In the iOS 15 version of Safari browser officially released on September 21, 2021,
we have confirmed that FairPlay DRM content cannot be played.
This phenomenon occurs in all HTML5 player running on iOS 15 version of Safari browser.
It is a situation where Apple needs to distribute an iOS patch that solves the problem.
The FairPlay content playback is possible in iOS 14 or lower version Safari, MacOS Safari, and iOS native app (AVPlayer).
We will provide further notice about it when the problem is resolved through Apple's actions.